mmdevapi: Use wide-char string literals.

Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
Signed-off-by: Andrew Eikum <aeikum@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Michael Stefaniuc 2020-11-24 23:29:16 +01:00 committed by Alexandre Julliard
parent 3bcabb2422
commit 591f06d85e
4 changed files with 40 additions and 92 deletions

View File

@ -41,27 +41,6 @@
WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi); WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi);
static const WCHAR software_mmdevapi[] =
{ 'S','o','f','t','w','a','r','e','\\',
'M','i','c','r','o','s','o','f','t','\\',
'W','i','n','d','o','w','s','\\',
'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
'M','M','D','e','v','i','c','e','s','\\',
'A','u','d','i','o',0};
static const WCHAR reg_render[] =
{ 'R','e','n','d','e','r',0 };
static const WCHAR reg_capture[] =
{ 'C','a','p','t','u','r','e',0 };
static const WCHAR reg_devicestate[] =
{ 'D','e','v','i','c','e','S','t','a','t','e',0 };
static const WCHAR reg_properties[] =
{ 'P','r','o','p','e','r','t','i','e','s',0 };
static const WCHAR slashW[] = {'\\',0};
static const WCHAR reg_out_nameW[] = {'D','e','f','a','u','l','t','O','u','t','p','u','t',0};
static const WCHAR reg_vout_nameW[] = {'D','e','f','a','u','l','t','V','o','i','c','e','O','u','t','p','u','t',0};
static const WCHAR reg_in_nameW[] = {'D','e','f','a','u','l','t','I','n','p','u','t',0};
static const WCHAR reg_vin_nameW[] = {'D','e','f','a','u','l','t','V','o','i','c','e','I','n','p','u','t',0};
static HKEY key_render; static HKEY key_render;
static HKEY key_capture; static HKEY key_capture;
@ -128,11 +107,7 @@ static inline IPropertyBagImpl *impl_from_IPropertyBag(IPropertyBag *iface)
return CONTAINING_RECORD(iface, IPropertyBagImpl, IPropertyBag_iface); return CONTAINING_RECORD(iface, IPropertyBagImpl, IPropertyBag_iface);
} }
static const WCHAR propkey_formatW[] = { static const WCHAR propkey_formatW[] = L"{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X},%d";
'{','%','0','8','X','-','%','0','4','X','-',
'%','0','4','X','-','%','0','2','X','%','0','2','X','-',
'%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X',
'%','0','2','X','%','0','2','X','}',',','%','d',0 };
static HRESULT MMDevPropStore_OpenPropKey(const GUID *guid, DWORD flow, HKEY *propkey) static HRESULT MMDevPropStore_OpenPropKey(const GUID *guid, DWORD flow, HKEY *propkey)
{ {
@ -145,11 +120,11 @@ static HRESULT MMDevPropStore_OpenPropKey(const GUID *guid, DWORD flow, HKEY *pr
WARN("Opening key %s failed with %u\n", debugstr_w(buffer), ret); WARN("Opening key %s failed with %u\n", debugstr_w(buffer), ret);
return E_FAIL; return E_FAIL;
} }
ret = RegOpenKeyExW(key, reg_properties, 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, propkey); ret = RegOpenKeyExW(key, L"Properties", 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, propkey);
RegCloseKey(key); RegCloseKey(key);
if (ret != ERROR_SUCCESS) if (ret != ERROR_SUCCESS)
{ {
WARN("Opening key %s failed with %u\n", debugstr_w(reg_properties), ret); WARN("Opening key Properties failed with %u\n", ret);
return E_FAIL; return E_FAIL;
} }
return S_OK; return S_OK;
@ -345,8 +320,8 @@ static MMDevice *MMDevice_Create(WCHAR *name, GUID *id, EDataFlow flow, DWORD st
if (RegCreateKeyExW(root, guidstr, 0, NULL, 0, KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &key, NULL) == ERROR_SUCCESS) if (RegCreateKeyExW(root, guidstr, 0, NULL, 0, KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &key, NULL) == ERROR_SUCCESS)
{ {
HKEY keyprop; HKEY keyprop;
RegSetValueExW(key, reg_devicestate, 0, REG_DWORD, (const BYTE*)&state, sizeof(DWORD)); RegSetValueExW(key, L"DeviceState", 0, REG_DWORD, (const BYTE*)&state, sizeof(DWORD));
if (!RegCreateKeyExW(key, reg_properties, 0, NULL, 0, KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &keyprop, NULL)) if (!RegCreateKeyExW(key, L"Properties", 0, NULL, 0, KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &keyprop, NULL))
{ {
PROPVARIANT pv; PROPVARIANT pv;
@ -404,11 +379,13 @@ static HRESULT load_devices_from_reg(void)
LONG ret; LONG ret;
DWORD curflow; DWORD curflow;
ret = RegCreateKeyExW(HKEY_LOCAL_MACHINE, software_mmdevapi, 0, NULL, 0, KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &root, NULL); ret = RegCreateKeyExW(HKEY_LOCAL_MACHINE,
L"Software\\Microsoft\\Windows\\CurrentVersion\\MMDevices\\Audio", 0, NULL, 0,
KEY_WRITE|KEY_READ|KEY_WOW64_64KEY, NULL, &root, NULL);
if (ret == ERROR_SUCCESS) if (ret == ERROR_SUCCESS)
ret = RegCreateKeyExW(root, reg_capture, 0, NULL, 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, NULL, &key_capture, NULL); ret = RegCreateKeyExW(root, L"Capture", 0, NULL, 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, NULL, &key_capture, NULL);
if (ret == ERROR_SUCCESS) if (ret == ERROR_SUCCESS)
ret = RegCreateKeyExW(root, reg_render, 0, NULL, 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, NULL, &key_render, NULL); ret = RegCreateKeyExW(root, L"Render", 0, NULL, 0, KEY_READ|KEY_WRITE|KEY_WOW64_64KEY, NULL, &key_render, NULL);
RegCloseKey(root); RegCloseKey(root);
cur = key_capture; cur = key_capture;
curflow = eCapture; curflow = eCapture;
@ -683,11 +660,6 @@ static HRESULT WINAPI MMDevice_GetId(IMMDevice *iface, WCHAR **itemid)
MMDevice *This = impl_from_IMMDevice(iface); MMDevice *This = impl_from_IMMDevice(iface);
WCHAR *str; WCHAR *str;
GUID *id = &This->devguid; GUID *id = &This->devguid;
static const WCHAR formatW[] = { '{','0','.','0','.','%','u','.','0','0','0','0','0','0','0','0','}','.',
'{','%','0','8','X','-','%','0','4','X','-',
'%','0','4','X','-','%','0','2','X','%','0','2','X','-',
'%','0','2','X','%','0','2','X','%','0','2','X','%','0','2','X',
'%','0','2','X','%','0','2','X','}',0 };
TRACE("(%p)->(%p)\n", This, itemid); TRACE("(%p)->(%p)\n", This, itemid);
if (!itemid) if (!itemid)
@ -695,9 +667,10 @@ static HRESULT WINAPI MMDevice_GetId(IMMDevice *iface, WCHAR **itemid)
*itemid = str = CoTaskMemAlloc(56 * sizeof(WCHAR)); *itemid = str = CoTaskMemAlloc(56 * sizeof(WCHAR));
if (!str) if (!str)
return E_OUTOFMEMORY; return E_OUTOFMEMORY;
wsprintfW( str, formatW, This->flow, id->Data1, id->Data2, id->Data3, wsprintfW(str, L"{0.0.%u.00000000}.{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}",
id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3], This->flow, id->Data1, id->Data2, id->Data3,
id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7] ); id->Data4[0], id->Data4[1], id->Data4[2], id->Data4[3],
id->Data4[4], id->Data4[5], id->Data4[6], id->Data4[7]);
TRACE("returning %s\n", wine_dbgstr_w(str)); TRACE("returning %s\n", wine_dbgstr_w(str));
return S_OK; return S_OK;
} }
@ -986,7 +959,7 @@ static HRESULT WINAPI MMDevEnum_GetDefaultAudioEndpoint(IMMDeviceEnumerator *ifa
return E_NOTFOUND; return E_NOTFOUND;
lstrcpyW(reg_key, drv_keyW); lstrcpyW(reg_key, drv_keyW);
lstrcatW(reg_key, slashW); lstrcatW(reg_key, L"\\");
lstrcatW(reg_key, drvs.module_name); lstrcatW(reg_key, drvs.module_name);
if(RegOpenKeyW(HKEY_CURRENT_USER, reg_key, &key) == ERROR_SUCCESS){ if(RegOpenKeyW(HKEY_CURRENT_USER, reg_key, &key) == ERROR_SUCCESS){
@ -995,11 +968,11 @@ static HRESULT WINAPI MMDevEnum_GetDefaultAudioEndpoint(IMMDeviceEnumerator *ifa
DWORD size = sizeof(def_id), state; DWORD size = sizeof(def_id), state;
if(flow == eRender){ if(flow == eRender){
reg_x_name = reg_out_nameW; reg_x_name = L"DefaultOutput";
reg_vx_name = reg_vout_nameW; reg_vx_name = L"DefaultVoiceOutput";
}else{ }else{
reg_x_name = reg_in_nameW; reg_x_name = L"DefaultInput";
reg_vx_name = reg_vin_nameW; reg_vx_name = L"DefaultVoiceInput";
} }
if(role == eCommunications && if(role == eCommunications &&
@ -1051,15 +1024,12 @@ static HRESULT WINAPI MMDevEnum_GetDevice(IMMDeviceEnumerator *iface, const WCHA
DWORD i=0; DWORD i=0;
IMMDevice *dev = NULL; IMMDevice *dev = NULL;
static const WCHAR wine_info_deviceW[] = {'W','i','n','e',' ',
'i','n','f','o',' ','d','e','v','i','c','e',0};
TRACE("(%p)->(%s,%p)\n", This, debugstr_w(name), device); TRACE("(%p)->(%s,%p)\n", This, debugstr_w(name), device);
if(!name || !device) if(!name || !device)
return E_POINTER; return E_POINTER;
if(!lstrcmpW(name, wine_info_deviceW)){ if(!lstrcmpW(name, L"Wine info device")){
*device = &info_device; *device = &info_device;
return S_OK; return S_OK;
} }
@ -1188,7 +1158,7 @@ static DWORD WINAPI notif_thread_proc(void *user)
DWORD size; DWORD size;
lstrcpyW(reg_key, drv_keyW); lstrcpyW(reg_key, drv_keyW);
lstrcatW(reg_key, slashW); lstrcatW(reg_key, L"\\");
lstrcatW(reg_key, drvs.module_name); lstrcatW(reg_key, drvs.module_name);
if(RegCreateKeyExW(HKEY_CURRENT_USER, reg_key, 0, NULL, 0, if(RegCreateKeyExW(HKEY_CURRENT_USER, reg_key, 0, NULL, 0,
@ -1198,23 +1168,19 @@ static DWORD WINAPI notif_thread_proc(void *user)
} }
size = sizeof(out_name); size = sizeof(out_name);
if(RegQueryValueExW(key, reg_out_nameW, 0, NULL, if(RegQueryValueExW(key, L"DefaultOutput", 0, NULL, (BYTE*)out_name, &size) != ERROR_SUCCESS)
(BYTE*)out_name, &size) != ERROR_SUCCESS)
out_name[0] = 0; out_name[0] = 0;
size = sizeof(vout_name); size = sizeof(vout_name);
if(RegQueryValueExW(key, reg_vout_nameW, 0, NULL, if(RegQueryValueExW(key, L"DefaultVoiceOutput", 0, NULL, (BYTE*)vout_name, &size) != ERROR_SUCCESS)
(BYTE*)vout_name, &size) != ERROR_SUCCESS)
vout_name[0] = 0; vout_name[0] = 0;
size = sizeof(in_name); size = sizeof(in_name);
if(RegQueryValueExW(key, reg_in_nameW, 0, NULL, if(RegQueryValueExW(key, L"DefaultInput", 0, NULL, (BYTE*)in_name, &size) != ERROR_SUCCESS)
(BYTE*)in_name, &size) != ERROR_SUCCESS)
in_name[0] = 0; in_name[0] = 0;
size = sizeof(vin_name); size = sizeof(vin_name);
if(RegQueryValueExW(key, reg_vin_nameW, 0, NULL, if(RegQueryValueExW(key, L"DefaultVoiceInput", 0, NULL, (BYTE*)vin_name, &size) != ERROR_SUCCESS)
(BYTE*)vin_name, &size) != ERROR_SUCCESS)
vin_name[0] = 0; vin_name[0] = 0;
while(1){ while(1){
@ -1228,13 +1194,13 @@ static DWORD WINAPI notif_thread_proc(void *user)
EnterCriticalSection(&g_notif_lock); EnterCriticalSection(&g_notif_lock);
notify_if_changed(eRender, eConsole, key, reg_out_nameW, notify_if_changed(eRender, eConsole, key, L"DefaultOutput",
out_name, &MMDevice_def_play->IMMDevice_iface); out_name, &MMDevice_def_play->IMMDevice_iface);
notify_if_changed(eRender, eCommunications, key, reg_vout_nameW, notify_if_changed(eRender, eCommunications, key, L"DefaultVoiceOutput",
vout_name, &MMDevice_def_play->IMMDevice_iface); vout_name, &MMDevice_def_play->IMMDevice_iface);
notify_if_changed(eCapture, eConsole, key, reg_in_nameW, notify_if_changed(eCapture, eConsole, key, L"DefaultInput",
in_name, &MMDevice_def_rec->IMMDevice_iface); in_name, &MMDevice_def_rec->IMMDevice_iface);
notify_if_changed(eCapture, eCommunications, key, reg_vin_nameW, notify_if_changed(eCapture, eCommunications, key, L"DefaultVoiceInput",
vin_name, &MMDevice_def_rec->IMMDevice_iface); vin_name, &MMDevice_def_rec->IMMDevice_iface);
LeaveCriticalSection(&g_notif_lock); LeaveCriticalSection(&g_notif_lock);
@ -1523,10 +1489,9 @@ static ULONG WINAPI PB_Release(IPropertyBag *iface)
static HRESULT WINAPI PB_Read(IPropertyBag *iface, LPCOLESTR name, VARIANT *var, IErrorLog *log) static HRESULT WINAPI PB_Read(IPropertyBag *iface, LPCOLESTR name, VARIANT *var, IErrorLog *log)
{ {
static const WCHAR dsguid[] = { 'D','S','G','u','i','d', 0 };
IPropertyBagImpl *This = impl_from_IPropertyBag(iface); IPropertyBagImpl *This = impl_from_IPropertyBag(iface);
TRACE("Trying to read %s, type %u\n", debugstr_w(name), var->n1.n2.vt); TRACE("Trying to read %s, type %u\n", debugstr_w(name), var->n1.n2.vt);
if (!lstrcmpW(name, dsguid)) if (!lstrcmpW(name, L"DSGuid"))
{ {
WCHAR guidstr[39]; WCHAR guidstr[39];
StringFromGUID2(&This->devguid, guidstr,ARRAY_SIZE(guidstr)); StringFromGUID2(&This->devguid, guidstr,ARRAY_SIZE(guidstr));

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@ -47,8 +47,7 @@ static HINSTANCE instance;
DriverFuncs drvs; DriverFuncs drvs;
const WCHAR drv_keyW[] = {'S','o','f','t','w','a','r','e','\\', const WCHAR drv_keyW[] = L"Software\\Wine\\Drivers";
'W','i','n','e','\\','D','r','i','v','e','r','s',0};
static const char *get_priority_string(int prio) static const char *get_priority_string(int prio)
{ {
@ -68,12 +67,10 @@ static const char *get_priority_string(int prio)
static BOOL load_driver(const WCHAR *name, DriverFuncs *driver) static BOOL load_driver(const WCHAR *name, DriverFuncs *driver)
{ {
WCHAR driver_module[264]; WCHAR driver_module[264];
static const WCHAR wineW[] = {'w','i','n','e',0};
static const WCHAR dotdrvW[] = {'.','d','r','v',0};
lstrcpyW(driver_module, wineW); lstrcpyW(driver_module, L"wine");
lstrcatW(driver_module, name); lstrcatW(driver_module, name);
lstrcatW(driver_module, dotdrvW); lstrcatW(driver_module, L".drv");
TRACE("Attempting to load %s\n", wine_dbgstr_w(driver_module)); TRACE("Attempting to load %s\n", wine_dbgstr_w(driver_module));
@ -106,11 +103,7 @@ static BOOL load_driver(const WCHAR *name, DriverFuncs *driver)
static BOOL WINAPI init_driver(INIT_ONCE *once, void *param, void **context) static BOOL WINAPI init_driver(INIT_ONCE *once, void *param, void **context)
{ {
static const WCHAR drv_value[] = {'A','u','d','i','o',0}; static WCHAR default_list[] = L"pulse,alsa,oss,coreaudio,android";
static WCHAR default_list[] = {'p','u','l','s','e',',','a','l','s','a',',','o','s','s',',',
'c','o','r','e','a','u','d','i','o',',','a','n','d','r','o','i','d',0};
DriverFuncs driver; DriverFuncs driver;
HKEY key; HKEY key;
WCHAR reg_list[256], *p, *next, *driver_list = default_list; WCHAR reg_list[256], *p, *next, *driver_list = default_list;
@ -118,8 +111,7 @@ static BOOL WINAPI init_driver(INIT_ONCE *once, void *param, void **context)
if(RegOpenKeyW(HKEY_CURRENT_USER, drv_keyW, &key) == ERROR_SUCCESS){ if(RegOpenKeyW(HKEY_CURRENT_USER, drv_keyW, &key) == ERROR_SUCCESS){
DWORD size = sizeof(reg_list); DWORD size = sizeof(reg_list);
if(RegQueryValueExW(key, drv_value, 0, NULL, (BYTE*)reg_list, if(RegQueryValueExW(key, L"Audio", 0, NULL, (BYTE*)reg_list, &size) == ERROR_SUCCESS){
&size) == ERROR_SUCCESS){
if(reg_list[0] == '\0'){ if(reg_list[0] == '\0'){
TRACE("User explicitly chose no driver\n"); TRACE("User explicitly chose no driver\n");
RegCloseKey(key); RegCloseKey(key);

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@ -384,8 +384,6 @@ static IMMNotificationClient notif = { &notif_vtbl };
/* Only do parameter tests here, the actual MMDevice testing should be a separate test */ /* Only do parameter tests here, the actual MMDevice testing should be a separate test */
START_TEST(mmdevenum) START_TEST(mmdevenum)
{ {
static const WCHAR not_a_deviceW[] = {'n','o','t','a','d','e','v','i','c','e',0};
HRESULT hr; HRESULT hr;
IUnknown *unk = NULL; IUnknown *unk = NULL;
IMMDeviceEnumerator *mme, *mme2; IMMDeviceEnumerator *mme, *mme2;
@ -426,13 +424,13 @@ START_TEST(mmdevenum)
ok(!unk, "Unk not reset to null after invalid QI\n"); ok(!unk, "Unk not reset to null after invalid QI\n");
ok(hr == E_NOINTERFACE, "Invalid hr %08x returned on IID_NULL\n", hr); ok(hr == E_NOINTERFACE, "Invalid hr %08x returned on IID_NULL\n", hr);
hr = IMMDeviceEnumerator_GetDevice(mme, not_a_deviceW, NULL); hr = IMMDeviceEnumerator_GetDevice(mme, L"notadevice", NULL);
ok(hr == E_POINTER, "GetDevice gave wrong error: %08x\n", hr); ok(hr == E_POINTER, "GetDevice gave wrong error: %08x\n", hr);
hr = IMMDeviceEnumerator_GetDevice(mme, NULL, &dev); hr = IMMDeviceEnumerator_GetDevice(mme, NULL, &dev);
ok(hr == E_POINTER, "GetDevice gave wrong error: %08x\n", hr); ok(hr == E_POINTER, "GetDevice gave wrong error: %08x\n", hr);
hr = IMMDeviceEnumerator_GetDevice(mme, not_a_deviceW, &dev); hr = IMMDeviceEnumerator_GetDevice(mme, L"notadevice", &dev);
ok(hr == E_INVALIDARG, "GetDevice gave wrong error: %08x\n", hr); ok(hr == E_INVALIDARG, "GetDevice gave wrong error: %08x\n", hr);
col = (void*)(LONG_PTR)0x12345678; col = (void*)(LONG_PTR)0x12345678;

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@ -33,14 +33,7 @@
static BOOL (WINAPI *pIsWow64Process)(HANDLE, BOOL *); static BOOL (WINAPI *pIsWow64Process)(HANDLE, BOOL *);
static const WCHAR software_renderW[] = static const WCHAR software_renderW[] =
{ 'S','o','f','t','w','a','r','e','\\', L"Software\\Microsoft\\Windows\\CurrentVersion\\MMDevices\\Audio\\Render";
'M','i','c','r','o','s','o','f','t','\\',
'W','i','n','d','o','w','s','\\',
'C','u','r','r','e','n','t','V','e','r','s','i','o','n','\\',
'M','M','D','e','v','i','c','e','s','\\',
'A','u','d','i','o','\\',
'R','e','n','d','e','r',0 };
static const WCHAR propertiesW[] = {'P','r','o','p','e','r','t','i','e','s',0};
static void test_propertystore(IPropertyStore *store) static void test_propertystore(IPropertyStore *store)
@ -138,7 +131,7 @@ static void test_setvalue_on_wow64(IPropertyStore *store)
static const PROPERTYKEY PKEY_Bogus = { static const PROPERTYKEY PKEY_Bogus = {
{0x1da5d803, 0xd492, 0x4edd, {0x8c, 0x23, 0xe0, 0xc0, 0xff, 0xee, 0x7f, 0x00}}, 0x7f {0x1da5d803, 0xd492, 0x4edd, {0x8c, 0x23, 0xe0, 0xc0, 0xff, 0xee, 0x7f, 0x00}}, 0x7f
}; };
static const WCHAR bogusW[] = {'{','1','D','A','5','D','8','0','3','-','D','4','9','2','-','4','E','D','D','-','8','C','2','3','-','E','0','C','0','F','F','E','E','7','F','0','0','}',',','1','2','7',0}; static const WCHAR bogusW[] = L"{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F00},127";
PropVariantInit(&pv); PropVariantInit(&pv);
@ -172,7 +165,7 @@ static void test_setvalue_on_wow64(IPropertyStore *store)
ret = RegOpenKeyExW(root, guidW, 0, KEY_READ|KEY_WOW64_64KEY, &devkey); ret = RegOpenKeyExW(root, guidW, 0, KEY_READ|KEY_WOW64_64KEY, &devkey);
ok(ret == ERROR_SUCCESS, "Couldn't open mmdevice guid key: %u\n", ret); ok(ret == ERROR_SUCCESS, "Couldn't open mmdevice guid key: %u\n", ret);
ret = RegOpenKeyExW(devkey, propertiesW, 0, KEY_READ|KEY_WOW64_64KEY, &props); ret = RegOpenKeyExW(devkey, L"Properties", 0, KEY_READ|KEY_WOW64_64KEY, &props);
ok(ret == ERROR_SUCCESS, "Couldn't open mmdevice property key: %u\n", ret); ok(ret == ERROR_SUCCESS, "Couldn't open mmdevice property key: %u\n", ret);
/* Note: the registry key exists even without calling IPropStore::Commit */ /* Note: the registry key exists even without calling IPropStore::Commit */